https://manageiq.github.io/optimist/

• Quickstart: See Optimist.options and then Optimist::Parser#opt.
• Examples: https://manageiq.github.io/optimist/.
• Wiki: https://github.com/ManageIQ/optimist/wiki

Optimist is a commandline option parser for Ruby that just gets out of your way. One line of code per option is all you need to write. For that, you get a nice automatically-generated help page, robust option parsing, and sensible defaults for everything you don't specify.

• Dirt-simple usage.
• Single file. Throw it in lib/ if you don't want to make it a Rubygem dependency.
• Sensible defaults. No tweaking necessary, much tweaking possible.
• Support for long options, short options, subcommands, and automatic type validation and conversion.
• Automatic help message generation, wrapped to current screen width.

• A burning desire to write less code.

• gem install optimist

require 'optimist'
opts = Optimist::options do
  opt :monkey, "Use monkey mode"                    # flag --monkey, default false
  opt :name, "Monkey name", :type => :string        # string --name <s>, default nil
  opt :num_limbs, "Number of limbs", :default => 4  # integer --num-limbs <i>, default to 4
end
p opts # a hash: { :monkey=>false, :name=>nil, :num_limbs=>4, :help=>false }

Copyright © 2008-2014 William Morgan.

Copyright © 2014 Red Hat, Inc.

Optimist is released under the MIT License.